Here is a versatile remote controlled appliance switch that can ON or OFF any appliance connected to it using a TV remote.

IR remote sensor IC TSOP 1738 is used for recieving the signal. Normally when no signal is falling on IC3 the output of it will be high.This makes Q1 OFF.When a signal of 38 KHz from the TV remote falls on the IC3 its output goes low.This makes Q1 conduct and a negative pulse is obtained at pin 2 of IC 1 NE 555.Due to this IC1 wired as a monostable multivibrator produces a 4 Sec long high signal at its out put.This high out put is the clock for IC 2 which is wired as a Flipflop and of , its two outputs pin 3 goes low and pin 2 goes high.The high output at pin 2 is amplified to drive the relay .For the next signal the outputs of IC2 toggles state. Result, we get a relay toggling on each press on the remote.Any appliance connected to this circuit can be switched ON or OFF.

Circuit Diagram with Parts List .

Notes.

Before wiring the circuit make sure that the carrier frequency of the TV remote you have is 38 KHz.For that wire the sensor part only ,point your remote to the TSOP1738 and press any switch.If out put of TSOP1738 goes low them ok, your remote is of 38Khz type.Nothing to worry almost all TV remote are of this type.

You can use any switch because for any switch the code only changes,the carrier frequency remains same.We need this carrier frequency only.

Assemble the circuit on a good quality PCB or common board.

The appliance can be connected through NO or NC and contacts of the relay .

please can this circuit be powered with 9v battery?
if yes, can you give me your contact so that i get help in building the circuit.
i am building a circuit which i can use to control an animal cage by using a remote i hhave tried different circuit but i still cannot get enough output to power the relay.

Sir, i want to design remote controlled home appliance ckt but in this circuit which type of relay used?i mean spdt or other and how many terminal of that relay? And at which terminals home appliance to be connected and which terminal circuit connected ? Plz sir give me detail abot relay and also abot IR same as that relay

Setharaman, i have (2) questions, (1) how can i wire this circuit to have 2 channels, or 4 channels. (2) How can i change the frequency of this circuit to enable it respond to other frequencies apart from the 38khz TV Remote transmitter

Seetharaman, thank you very much, i have built this circuit. It is working very fine… But i have (2) problems:- (1) how can i reduce the 4sec long signal produce by the monostable NE555 to just (one) 1sec or even less than? (2) what is the minimum and the maximum power i can give to the circuit.. and what are the current ratings?

Setharaman, thank you very much, i have built this circuit, and is working fine… but one problem am having is the 4 sec long high signal produce by the NE555. It delays too much How can i reduce the 4 sec to 1 sec or even lower.

Seetharaman, i noticed something in this circuit, 10k resistor need to be connected between base and emitter of transistor (Q1), because the Remote tester circuit in this site, has 10k resistor in between base and emitter, why is this one not having 10k resistor? Will this circuit work, have you tried it before?

Hi Rex In Tester the signal is taken from collector and in the above is taken from emitter. As per datasheet the condition for this IC is “The output voltage should not be hold continuously at a voltage below 3.3V by the external circuit”. Hence it is not required for the above circuit.

but if i want to make an ir remote controlled switch board for more than one on/off appliances using a microcontroller, then in that case could you please provide me with the circuit diagram of that.
and necessary details of that
thanks

Hi Javid 1 to 1.5mm bit can beused. Use 12 volt relay increase the supply to 12 volts DC add a 560 ohms 1/4 between supply at the relay point to IC2 Pin16 in the positive rail. This will take care of the rest of the circuits

hye ! I m using tsop 1838 an when i press tv remote switch ,d output goes to 3.94 v frm 4.9 , cn i use this in this crcuit n if not what actually is active low output of pin 3 frm tsop 1738 when ir is sensed

@seetharaman and all., i have two questions., can u plz resolve for me…..?
1.can i use 38 khz remote transmitter for sony IR-D15A….?
2.can i control my home appliances like fan or light ? BY driving a relay with the output of IR-D15A., will it drive a relay? 5v SPDT relay., so tat i can control my home appliances?
plz reply ……. 🙂

it is possible to celling fan which is to be used in home appliances can you say that this circuit is applicable or not if it is not possible then send a appropriate circut for remote control celling fan thanking you

can i connect light,fan,refregirator to this single circuit and operate.
if we cannot what is the alternative to operate all the house hold elements.
some body please help me in making a house hold appliances circuit.

the load that can be connected to this circuit depends on the current capacity of the relay that you are using.
You can get only one switching action from this circuit.More that one devices cannot be independently switched.

its is working i have made this but the main problem iam facing is that when i apply voltage to the circuit it energises the relas mean it gets triggered every but its working i want to remove this triggering on power apply help me plz

I made this circuit. Its 100% working. But it is a complicated one. I designed my circuit slightly changing the above one which is very easy to make and working. contact me at arifuddin2007@gmail.com
for the schematic. hope you all like it.. 🙂